Heating device



M. 1. WHELAN.

HEATING DEVICE. APPLICATION FILED FEB. 17. I922.

17,428, 349 Patented Sept. 5, 1922 Patented Sept. 5, 1922 PATENT OFFICE.

warm .1. wnnmm, or cmrrounmenrs, PENNSYLVANIA.

HEATING- DEVICE Lpplication filed. February 17, 1922. Serial Roi 537,215.

To all wh'o'm it may concern."

Be it known that I, MARTIN J. WHELAN, a citizen of the United States, residing at Clifton Heights, in the county of Delaware 6 and State of Pennsylvania, haveinvented new and useful Improvements in a.Heat-1n g Device, of which the following is a specilfication. V

My invention relates to new and useful improvements in a heating device, and has for itsobject to provide a heating element of unique construction for submersion 1n the liquid to be heated. 1 I

.Another ob'ect of the invention is to provide means or mounting the above mentioned heating-element within a suitable liquid container.

A further object ofthe invention is to provide a heating element consisting of a glass ,20 rod to which the conductors and. filament are attached having a two part casing enclosing that end of the rod which supports the filament, one of the parts of said casing being fused to the glass rod with the other part connected'thereto in such manner as to permit expansion and contraction without breaking the point and a partition of mulating material so located within, the casing as to keep some of the generated heat from reaching the major portion from the en closed end of the glass rod.

With these ends in view, this invention consists in the details of constructlon and combination of elements hereinafter set forth and then specifically designated by'the claims. 7 H

In order that those skilled in the art to which this invention appertalns, may understand how'to make and use the same, I

' will. describe its construction in detail, re

ferring by numerals to vthe accompanymg drawings forming a partof this appllcation, in whichzi i Fig. 1, is a fragmentary sectional v ew of a'oontainer showing my improved heating element applied thereto, a portlonof which is illustrated in section to set forthcertain details of construction.

r Fig. 2, is an outer end view thereof with a '50 portionfof the casing broken away,

In carrying out my invention as here embodied, 2 represents a container of any suitable size or confi ration preferably in the form of an uprig t boiler having any suitable valve controlled inlet and outlet for the l quid. The container also has an access opening 3 leading thereto which opening is surrounded by a flange 4: internall threaded to-receive the'plug 5 provided with a bore 6 of two different diameters so as to'produce a'packlng'h hamber 7 to hold a suitable packlng WhlC is compressed by the gland 8 threaded in the chamber 7, a follower ring 9 being preferably located between the gland and the packing substance.

The numeral 10 denotes my improvedheating element consisting of a tube "or" body 11 constrlfcted from glass or other. suitable heat resisting and insulating material which is held in place by the packing material or body pass the conductors or wires 12 and 13 connected at one .end with the filament 14: and at the other end with suitable parts of the plug 15. r

The major portion ofthe tube or body 11 is inclosed in a metal barrel 16 having an inturned flange 17 at its inner end for en it is herein'shown as comprising 'a'cap' 20 set over the outer end of the barrel 16 and se cured thereto in a suitable manner, the body -ofsaid cap having an opening 21 therein through Wl'llCll' PIOJGCtS a plug-22 carried by I within the chamber 7 and through this tube a suitable disc 23 of insulation material mounted in the cap. One of the conductor wires is fixed to the plug 22 and the other is secured directl to the cap 20. Such construction permits o'f disassembling the parts should the necessity arise.

The inner end of the tube of body 11 is preferably reduced to rovide an extension 24 within which i is used an additional amount of glass 25 to fasten the conductor wires at this point and produce a gas tight closure. This extension and the filament are enclosed within a two part casing 26 wholly of metal or other suitable heat conducting material consisting of the frusto conical back member 27. with its smaller end secured to the inner end of the barrel and a concavoconvex front member 28 having a clinch flange 29 for coaction with the similar clinch flange 30. formed at the larger end of the back member 27 which construction will permit free movement of the parts during ex: pansion and contraction of the casing without breaking the joint between the back and front members. This casing forms a gas chamber 31 from which the air is first extracted and then filled with a suitable element or gas such as nitrogen as in a nitrogen lamp. This chamber is divided into two compartments 32 and 33 by the heat reflector 34 produced from any suitable-material and is supported in the angle of the casing formed at the junction of the two parts 27 and 28. This heat reflector or partition only loosely fits the parts of the heating element so that the compartments 32 and 33 are in communication practically the same as one single chamber and this reflector, if found desirable ma en a e a. flan e 35 on the extension of the g In actual practice the filament is located as close to thefront member 28 of the easing as is practicable without forming a short circuit so that the greatest amount of heat will be trasmitted to the substance bein heated.

roni the foregoing description it will be seen that sucha device will be relatively inexpensive in the cost of manufacture although strong and durable and when installed within a suitable container the heat generated will be transmitted fromthe casing 16 to the surrounding liquid and cause it to be quickly raised in temperature.

Of course I do not wish to be limitedto the exact details of construction as herein shown as these may be varied within the limits of the appended claims without departing fromthe spirit of my invention; b

invention,

Havin thus fully described my what I claim as new and useful is 1. In a heating device the combination of a container having an access opening leading to the interior thereof, an interior- ,b ally threaded flange surroundingsaid opening, a plug having a bore therethrough of two different diameters, the larger diameter forming a chamber for the reception of packing material, said plug having threaded connection with the flange, a packing connection with the plug to set up the packing within the chamber, and a heatin element connected with the plug and helf in position by the compressed packing. in'the packing chamber.

within the casin ing to the interiorthereof, an internally threaded flange surrounding said opening,

a plug having a bore therethrough of two di erent diameters, the larger diameter forming a chamber for the reception of packing material, said plug having threaded connection with the flange, a packing gland having threaded connection with the plug to set up the packing within the chamber, a heating element detachably connected with the plug and consisting of a glass bar or body, conductors embedded in said bod a filament at the inner end' of said bo y with which said conductors are joined, and a casing surrounding the inner end of said body with a portion thereof embedded in said body. a

3. In a device of the character stated, a heating element consisting of a glass bar body, a filament supported by its inner end, a connector lug carried by the outer end thereof, con uctors embedded in said body and joined to the filament by which any electric current may be conveyed from a source of electrical energy to the filament,

a two part body consisting of a frustothe major portion of the inner end of the glass body in the compartment withoutthe filament.

4. A heating element comprising a body of heat resisting material to support a filament and a metal casing enclosing said filament.

5. A heating element consisting of a body, 'a metal casing on one end of said body to form an air tight chamber and a filament sdpported by the body within said cham- 6. A heating element consisting of a bod a metal casing on one end of said bo y and forming a gas chamber and a filament supported by the body within said chamer in close proximity to one of the walls of the casing.

7 A heating mounted on one end of said body an forming a chamber which isv filled with gas after the air is extracted, a filament su' ported by the body within said chamber m such close proximity to the casing as will not form a short circuit and a heat reflector 8. A heating element consisting'of a body element consisting of a body of heat resisting material,'a metal casing of heat material, a metal within the casing, said reflector also acting mounted on one endof said an as a artition to 'protect a portion of the forming a chamber which is filled wlth gas body m the heat in the chamber. 10

after the air is'extracted, a filament sup In testimony whereof, I have hereunto ported by the body said chamber 1n aflixecl my signature. such closeproximity to the casing as will not form a short circuit and a'heat reflector MARTIN J. WHEL 

